Poll: Trump beats Warren, Biden in Iowa match-ups

President TrumpDonald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE holds a slim lead in Iowa over former Vice President Joe BidenJoe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE and Sen. Elizabeth WarrenElizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) in hypothetical match-ups, according to a new poll.

The survey by Emerson College found that 51 percent of registered voters said they would choose Trump over Biden. Respondents favored Trump by the same 51 percent-49 percent margin in a match-up against Warren.

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The reverse was the case for Sen. Bernie SandersBernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.). Fifty-one percent of voters said they would pick him over Trump, who garnered 49 percent support.

The results of all three match-ups fell within the poll's 3.2 percentage-point margin of error.

The survey also found Warren and Biden leading the Democratic field, tied at 23 percent support among Democratic caucusgoers. South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE was in third place with 16 percent, followed by 13 percent for Sanders.

Researchers surveyed 888 registered voters, including 317 Democratic caucusgoers, from Oct. 13-16. The Democratic caucusgoer responses have a margin of error of plus or minus 5.5. percentage points.

The Iowa caucus is scheduled for Feb. 3.